Biography

Location

Interests

Occupation

Name: Do Anti-lock Brakes use Static or Kinetic Friction? by Billy Category: Dynamics Date Added: 2016-06-30 Submitter: Flipping Physics
Billy analyzes ABS brakes to show the difference between Rolling without Slipping and Rolling with Slipping. He also answers the question in the title of the video, but why would I write that in the description? Want Lecture Notes? This is an AP Physics 1 Topic.
Content Times:
0:17 ABS Brakes
0:40 Demonstrating Rolling without Slipping and Rolling with Slipping
1:36 How ABS Brakes work
2:18 Analyzing a car tire
3:34 The calculations
Next Video: Everybody Brought Mass to the Party!
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Does the Book Move? An Introductory Friction Problem
Please support me on Patreon!
Do Anti-lock Brakes use Static or Kinetic Friction? by Billy

Billy analyzes ABS brakes to show the difference between Rolling without Slipping and Rolling with Slipping. He also answers the question in the title of the video, but why would I write that in the description? Want Lecture Notes? This is an AP Physics 1 Topic.
Content Times:
0:17 ABS Brakes
0:40 Demonstrating Rolling without Slipping and Rolling with Slipping
1:36 How ABS Brakes work
2:18 Analyzing a car tire
3:34 The calculations
Next Video: Everybody Brought Mass to the Party!
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Does the Book Move? An Introductory Friction Problem
Please support me on Patreon!

Bob is barreling down the thruway in his truck at 40 m/s when a crash occurs in front of it. The driver wants to stop in the shortest distance possible. He slams on the brakes. Before the invention and implementation of the Anti-lock brake system, or ABS, the truck's tires would have locked up and the truck would have slid into the crash.
Why?
When brakes cause tires to lock up, the type of friction between the tires and road changes from static friction to kinetic friction. This decreases the total force of friction between the surfaces. Because of the decrease in force opposing the truck's motion, the truck cannot stop in a short distance.
How does the ABS prevent this?
The Anti-lock brake system prevents the tires from locking up. Therefore, the type of friction between the tires and the road is always static, the strongest type of friction. The implementation of ABS into modern cars and trucks has prevented crashes from panicked drivers, such as Bob, by allowing them to come to a complete stop in shorter distances than before possible, even better than experienced drivers using advanced braking techniques without ABS.

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.